Problem $1.$ A pipe placed at a $30$ angle relative to horizontal has a diameter of $200$ mm

and length of $100$ m $.$ The pressure head is $7\mathrm{.}5$ m at the upper end. The pipe flow is $125$

liters per second and the head loss is $3\mathrm{.}50$ m $.$ Calculate the pressure at the bottom end in

Pa when the flow is a$)$ upward; and, b$)$ downward. The fluid is water